his death in 1531. The Zurich Bible, based on that of Zwingli, was issued in 1531. The Reformation resulted in major changes in state matters and civil life in Zurich, spreading also to a number of other cantons. Several cantons remained Catholic and became the basis of serious conflicts that eventually led to the outbreak of the Wars of Kappel.
During the 16th and 17th centuries, the Council of Zurich adopted an isolationist attitude, resulting in a second ring of imposing fortifications built in 1624. The Thirty Years' War which raged across Europe motivated the city to build these walls. The fortifications required a lot of resources, which were taken from subject territories without reaching any agreement. The following revolts were crushed brutally. In 1648, Zurich proclaimed itself a republic, shedding its former status of a free imperial city.
The Helvetic Revolution of 1798 saw the fall of the Ancien R�gime. Zurich lost control of the land and its economic privileges, and the city and the canton separated their possessions between 1803�1805. In 1839, the city had to yield to the demands of its urban subjects, following the Z�riputsch of 6 September. Most of the ramparts built in the 17th century were torn down, without ever having been besieged, to allay rural concerns over the city's hegemony. The Treaty of Zurich between Austria, France, and Sardinia was signed in 1859.
Modern history
Zurich was the Federal capital for 1839�40, and consequently the victory of the Conservative party there in 1839 caused a great stir throughout Switzerland. But when in 1845 the Radicals regained power at Zurich, which was again the Federal capital for 1845�46, Zurich took the lead in opposing the Sonderbund cantons. Following the Sonderbund war and the formation of the Swiss Federal State, Zurich voted in favour of the Federal constitutions of 1848 and of 1874. The enormous immigration from the country districts into the town from the
